package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrdersMapper;
import com.sky.mapper.UserMapper;
import com.sky.result.Result;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * @Auther: zhaoss
 * @Date: 2023/5/9 - 05 - 09 - 17:18
 * @Description: com.sky.service.impl
 * @version: 1.0
 */
@Service
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrdersMapper ordersMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 营业额统计接口
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public Result turnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dates = new ArrayList<>();
        dates.add(begin);
        while (!begin.equals(end)) {//如果当前时间不等于最后一天的话
            begin = begin.plusDays(1);//在指定的时间+1天
            dates.add(begin);//把每一天的日期加入list集合中
        }

        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dates) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("status", Orders.COMPLETED);
            map.put("begin", beginTime);
            map.put("end", endTime);
            Double turnover = ordersMapper.turnover(map);
            turnover = (turnover == null ? 0 : turnover);
            turnoverList.add(turnover);
        }
        TurnoverReportVO vo = new TurnoverReportVO(
                StringUtils.join(dates, ","),
                StringUtils.join(turnoverList, ","));

        return Result.success(vo);
    }

    /**
     * 用户统计接口
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public Result userStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dates = new ArrayList<>();
        dates.add(begin);
        while (!begin.equals(end)) {//如果当前时间不等于最后一天的话
            begin = begin.plusDays(1);//在指定的时间+1天
            dates.add(begin);//把每一天的日期加入list集合中
        }

        List<Integer> allUsers = new ArrayList<>();
        List<Integer> newUsers = new ArrayList<>();

        for (LocalDate date : dates) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("end", endTime);
            Integer allUserCount = userMapper.userCount(map);
            map.put("begin", beginTime);
            Integer newUserCount = userMapper.userCount(map);

            allUsers.add(allUserCount);
            newUsers.add(newUserCount);

        }
        UserReportVO vo = UserReportVO.builder()
                .dateList(StringUtils.join(dates, ","))
                .newUserList(StringUtils.join(newUsers, ","))
                .totalUserList(StringUtils.join(allUsers, ","))
                .build();
        return Result.success(vo);
    }

    /**
     * 有效订单统计接口
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public Result ordersStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dates = new ArrayList<>();
        dates.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dates.add(begin);
        }

        //当天订单数
        List<Integer> allOrderDay = new ArrayList<>();
        //当天有效订单数
        List<Integer> validOrderDay = new ArrayList<>();



        for (LocalDate date : dates) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map =new HashMap();
            map.put("end", endTime);
            map.put("begin", beginTime);
            Integer orderCountDay = ordersMapper.orderCount(map);
            orderCountDay = (orderCountDay==null?0:orderCountDay);
            allOrderDay.add(orderCountDay);

            map.put("status", Orders.COMPLETED);
            Integer validOrderCount = ordersMapper.orderCount(map);
            validOrderCount = (validOrderCount==null?0:validOrderCount);
            validOrderDay.add(validOrderCount);
        }
        //2.7 获取时间区间内的总订单数和有效订单数以及订单完成率
        //聚合求和总订单数
        Integer allOrder = allOrderDay.stream().reduce(Integer::sum).get();
        //聚合求和有效订单数
        Integer validAllOrder = validOrderDay.stream().reduce(Integer::sum).get();
        //订单完成率=有效订单数/总订单数
        Double orderCompletionRate = 0.0;
        if(allOrder != 0){
            orderCompletionRate = validAllOrder.doubleValue() / allOrder;
        }

        OrderReportVO vo = OrderReportVO.builder()
                .dateList(StringUtils.join(dates, ","))
                .orderCountList(StringUtils.join(allOrderDay, ","))
                .validOrderCountList(StringUtils.join(validOrderDay, ","))
                .totalOrderCount(allOrder)
                .validOrderCount(validAllOrder)
                .orderCompletionRate(orderCompletionRate)
                .build();
        return Result.success(vo);
    }

    /**
     * top10统计接口
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public Result top10(LocalDate begin, LocalDate end) {
        LocalDateTime newBegin = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime newEnd = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10List = ordersMapper.getSalesTop10(newBegin, newEnd);
        List<String> nameList = salesTop10List.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> numberList = salesTop10List.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        //5.返回数据
        SalesTop10ReportVO vo = SalesTop10ReportVO.builder()
                .nameList(StringUtils.join(nameList, ","))
                .numberList(StringUtils.join(numberList, ","))
                .build();
        return Result.success(vo);
    }

    /**导出近30天的运营数据报表
     * @param response
     **/
    public void exportBusinessData(HttpServletResponse response) {
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);
        //查询概览运营数据，提供给Excel模板文件
        BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(begin,LocalTime.MIN), LocalDateTime.of(end, LocalTime.MAX));
        InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            //基于提供好的模板文件创建一个新的Excel表格对象
            XSSFWorkbook excel = new XSSFWorkbook(inputStream);
            //获得Excel文件中的一个Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            sheet.getRow(1).getCell(1).setCellValue(begin + "至" + end);
            //获得第4行
            XSSFRow row = sheet.getRow(3);
            //获取单元格
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessData.getNewUsers());
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getUnitPrice());
            for (int i = 0; i < 30; i++) {
                LocalDate date = begin.plusDays(i);
                //准备明细数据
                businessData = workspaceService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }
            //通过输出流将文件下载到客户端浏览器中
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);
            //关闭资源
            out.flush();
            out.close();
            excel.close();

        }catch (IOException e){
            e.printStackTrace();
        }
    }

}
